body, html
  line-height 1
  font-weight 200
  font-family 'PingFang SC', 'ST', 'STHeitiSC-Light', 'Helvetica-Light', arial, sans-serif

.clearfix
  display inline-block
  &:after
    display block
    content: ""
    height 0
    line-height 0
    clear both
    visibility hidden

@media (-webkit-min-device-pixel-ratio: 1.5), (min-device-pixel-ratio: 1.5)
  .border-1px
    &:after
      -webkit-transform: scaleY(0.7)
      transform: scaleY(0.7)
@media (-webkit-min-device-pixel-ratio: 2), (min-device-pixel-ratio: 2)
  .border-1px
    &:after
      -webkit-transform: scaleY(0.5)
      transform: scaleY(0.5)
      
@media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3)
  .border-1px
    &::after
      -webkit-transform: scaleY(0.333334)
      transform: scaleY(0.333334)
